Genetics is central to biology because genes and their functions form the basis of all life processes
Indicate whether the statement is true or false
TRUE
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The high productivity and short food chains of ____ areas support the greatest biomass of any planktonic system
a. stable water column b. turbid c. upwelling d. downwelling e. coral reef.
Male hummingbirds flash a patch of iridescent feathers on their neck called the gorget. This behavior makes them very visible. Why advertise their presence to a predator?
A. Hummingbirds are so fast that predation is not a large factor for them. B. Predators cannot see colors so are not alerted. C. The benefits of defending a territory exceed the costs of predation. D. This is an example of a maladaptive behavior that decreases overall fitness. Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about the tradeoff of being visible to potential mates and predators? What other information is related to the question? Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The only known source of human embryonic stem cells is:
a. placental tissue. b. umbilical cords. c. early human embryos. d. brain tissue. e. nerve tissue.
A prehensile tail is like an opposable thumb in that both
A) evolved before the anthropoids. B) are used for grasping. C) can be fully bent in any direction. D) are characteristics of the earliest primates.